Chalaza

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chalaza

[kə′lāz·ə]
(botany)
The region at the base of the nucellus of an ovule; gives rise to the integuments.
(cell and molecular biology)
One of the paired, spiral, albuminous bands in a bird's egg that attach the yolk to the shell lining membrane at the ends of the egg.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Chalaza

 

the basal part of the ovule where the seed stalk attaches the ovule to the placenta.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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There are five black chalazae in the anterior edge of T1 oriented forward.
Immature stages and life cycle of the wasp moth, Cosmosoma auge (Lepidoptera: Erebidae: Arctiinae) under laboratory conditions
Six conical protuberances (or enlarged chalazae), in different sizes, on middorsal to lateral area; color varies from creamy white to dark brown; bearing a single seta at apex.
Life history of Manataria maculata (Lepidoptera: Satyrinae) from Costa Rica
The capsules are connected to one another by thin strands called chalazae. In O.
Morphology and development of Odostomia columbiana dall and bartsch (pyramidellidae): implications for the evolution of gastropod development
The layers are the chalaziferous layer which is continuous with the chalazae which hold the yolk in place, the inner thin layer, the firm or thick layer and the outer thin layer.
Making the grade: have you ever wondered how they come up with those grading scales you see on egg cartons? It's not just about weight
The white string-like thing around the yolk ending in a small clump is a chalazae. It anchors the yolk (and perhaps developing chick) and keeps it centered.
A chicken primer. (The henhouse)

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